A build of DOSBox SVN for Mac OS X 10.4+ using the PowerPC JIT from Vogons: https://www.vogons.org/viewtopic.php?f=32&t=65057
Apply the patch to DOSBox trunk, set config.h.in appropriately (including enabling dynrec) and then build DOSBox. This version does not run on Intel Macs, and is not intended to run under Rosetta (use mainline DOSBox or Dominus' SVN builds instead).
Suggested settings are included as a Preferences file. You should copy this to ~/Library/Preferences/DOSBox SVN...